LM2904WDT Equivalent & Substitute Parts

Part Overview

The LM2904WDT is a general-purpose operational amplifier featuring two circuits in an 8-SOIC surface mount package, manufactured by Rohm Semiconductor. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The LM2904WDT operates across a wide supply voltage range of 3V to 32V with a slew rate of 0.3V/µs and gain bandwidth product of 1.1 MHz, making it suitable for general-purpose amplification applications requiring low-power operation and moderate bandwidth performance.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Slew Rate	0.3	V/µs
Gain Bandwidth Product	1.1	MHz
Current - Input Bias	20	nA
Voltage - Input Offset	1	mV
Current - Supply	600	µA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	32	V
Operating Temperature	-40 to 125	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LM2904WDT is determined by compatibility across the following critical parameters: amplifier type, number of circuits, package form factor, mounting type, and electrical performance specifications including slew rate, gain bandwidth product, supply voltage range, and operating temperature range.

The substitute parts are grouped into two primary categories:

Category 1: General-Purpose Amplifiers (Active Status) Parts LM1458M/NOPB, LM1458MX/NOPB, LM158DT, LM258ADR, and LM258D maintain the general-purpose amplifier classification with dual-circuit configuration in 8-SOIC surface mount packages. These devices share compatible supply voltage ranges and output current capabilities with the LM2904WDT.

Category 2: J-FET Amplifiers (Active Status) Parts ADA4062-2ARZ, ADA4062-2ARZ-R7, ADA4062-2ARZ-RL, ADA4062-2BRZ, and ADA4062-2BRZ-R7 represent J-FET input amplifier variants manufactured by Analog Devices Inc. These devices feature dual-circuit configuration in 8-SOIC packages with enhanced slew rate performance (3.3V/µs) and significantly lower input bias current (2 pA), offering superior performance characteristics while maintaining package compatibility.

Substitution eligibility is based on: identical package geometry (8-SOIC), dual-circuit configuration, surface mount mounting type, compatible supply voltage ranges, and operating temperature coverage. All substitute parts maintain ROHS3 compliance and MSL Level 1 rating.

Parameter Comparison

Parameter	LM2904WDT	ADA4062-2ARZ	ADA4062-2BRZ	LM1458M/NOPB	LM158DT	LM258ADR	LM258D
Manufacturer	Rohm Semiconductor	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments	STMicroelectronics	Texas Instruments	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Amplifier Type	General Purpose	J-FET	J-FET	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	2	2	2	2	2	2	2
Slew Rate (V/µs)	0.3	3.3	3.3	0.5	0.6	0.3	0.6
Gain Bandwidth Product (MHz)	1.1	1.4	1.4	1	1.1	0.7	1.1
Current - Input Bias (nA)	20	0.002	0.002	200	20	15	20
Voltage - Input Offset (mV)	1	0.75	0.5	1	5	2	5
Current - Supply (µA)	600	330	330	6000	1400	1000	1400
Current - Output / Channel (mA)	40	20	20	—	40	40	40
Voltage - Supply Span (Min) (V)	3	8	8	36	3	3	3
Voltage - Supply Span (Max) (V)	32	36	36	36	30	32	30
Operating Temperature (°C)	-40 to 125	-40 to 125	-40 to 125	0 to 70	-55 to 125	-25 to 85	-40 to 105
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1	1	1	1	1	1	1

Engineering Selection Recommendations

For Direct General-Purpose Replacement (Active Product Status)

LM258ADR and LM258D are direct functional replacements for the LM2904WDT, maintaining identical amplifier type classification, dual-circuit configuration, and compatible electrical specifications. Both devices are manufactured by established suppliers (Texas Instruments and STMicroelectronics respectively) with active product status, ensuring long-term availability and supply chain continuity. LM258D provides extended operating temperature range (-40°C to 105°C) compared to LM258ADR (-25°C to 85°C), making it suitable for applications requiring broader temperature coverage. Both maintain ROHS3 compliance and MSL Level 1 rating.

LM158DT, manufactured by STMicroelectronics, offers automotive-grade qualification (AEC-Q100) with extended temperature range (-55°C to 125°C), providing enhanced reliability for demanding applications. This device maintains compatible supply voltage range and output current specifications.

For Enhanced Performance Applications

ADA4062-2ARZ, ADA4062-2ARZ-R7, ADA4062-2ARZ-RL, ADA4062-2BRZ, and ADA4062-2BRZ-R7 represent J-FET input amplifier variants offering superior performance characteristics. These devices feature 11-fold improvement in slew rate (3.3V/µs versus 0.3V/µs), significantly lower input bias current (2 pA versus 20 nA), and improved gain bandwidth product (1.4 MHz versus 1.1 MHz). However, these devices require minimum supply voltage of 8V compared to 3V for the LM2904WDT, necessitating circuit design verification for low-voltage applications.

ADA4062-2BRZ and ADA4062-2BRZ-R7 provide superior input offset voltage specification (500 µV) compared to ADA4062-2ARZ variants (750 µV), offering enhanced precision for applications requiring tighter offset voltage tolerance.

For Legacy System Continuity

LM1458M/NOPB and LM1458MX/NOPB maintain general-purpose amplifier classification with dual-circuit configuration in compatible 8-SOIC packages. These devices are suitable for applications where performance specifications align with the LM2904WDT. Operating temperature range is limited to 0°C to 70°C, restricting use to commercial-grade applications.

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring environmental and moisture sensitivity compatibility with the original LM2904WDT.

Frequently Asked Questions (FAQ)

Q: Can the ADA4062-2ARZ directly replace the LM2904WDT in all applications?

A: The ADA4062-2ARZ is package-compatible and functionally equivalent in terms of dual-circuit configuration and 8-SOIC form factor. However, the minimum supply voltage requirement of 8V versus 3V for the LM2904WDT requires verification for applications operating at lower supply voltages. The J-FET input architecture provides superior performance characteristics including higher slew rate and lower input bias current, making it suitable for precision applications. Circuit design review is necessary to confirm compatibility with existing power supply specifications.

Q: What is the primary difference between ADA4062-2ARZ and ADA4062-2BRZ?

A: Both devices are J-FET input amplifiers with identical electrical performance except for input offset voltage specification. The ADA4062-2BRZ provides tighter input offset voltage tolerance of 500 µV compared to 750 µV for the ADA4062-2ARZ. Selection between these variants depends on application requirements for input offset voltage precision. Both devices maintain identical slew rate, gain bandwidth product, and supply voltage specifications.

Q: Are there packaging differences among the ADA4062-2ARZ variants?

A: The ADA4062-2ARZ variants differ in packaging and delivery format: ADA4062-2ARZ is supplied in Tube packaging, ADA4062-2ARZ-R7 is supplied in Cut Tape (CT) & Digi-Reel® format, and ADA4062-2ARZ-RL is supplied in Tape & Reel (TR) format. All variants maintain identical electrical specifications and 8-SOIC package geometry. Selection among variants is based on procurement and assembly process requirements rather than electrical performance.

Q: Is the LM258ADR suitable for automotive applications?

A: The LM258ADR is a commercial-grade device without automotive qualification. For automotive applications requiring AEC-Q100 qualification, the LM158DT manufactured by STMicroelectronics is the appropriate selection, offering automotive-grade qualification with extended operating temperature range (-55°C to 125°C).

Q: What are the supply voltage constraints when substituting with ADA4062 variants?

A: The ADA4062 series requires minimum supply voltage of 8V, compared to 3V minimum for the LM2904WDT. Applications operating at supply voltages below 8V cannot use ADA4062 variants without circuit redesign. The LM258ADR, LM258D, and LM158DT maintain the 3V minimum supply voltage specification, making them suitable for low-voltage applications.

Q: Do all substitute parts maintain the same output current capability?

A: The LM2904WDT specifies 40 mA output current per channel. The ADA4062 series provides 20 mA output current per channel, representing a 50% reduction in output drive capability. Applications requiring 40 mA output current per channel must use LM158DT, LM258ADR, or LM258D, which maintain the original 40 mA specification. Circuit design review is necessary to confirm output current requirements.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring environmental and handling compatibility with the original LM2904WDT. No additional environmental qualification or moisture sensitivity management is required when substituting with any of the listed alternatives.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message